Handle rotary encoder connected to two pins. With interrupt. Operating encoder changes an int position value that can be polled.
Dependents: encoder_test distance_measure speed_measure straight_speed_control ... more
CRotaryEncoder.h@0:56f636261771, 2010-11-09 (annotated)
- Committer:
- Raabinator
- Date:
- Tue Nov 09 20:14:32 2010 +0000
- Revision:
- 0:56f636261771
First version
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Raabinator | 0:56f636261771 | 1 | #ifndef CROTENC_H_INCLUDED |
Raabinator | 0:56f636261771 | 2 | #define CROTENC_H_INCLUDED |
Raabinator | 0:56f636261771 | 3 | |
Raabinator | 0:56f636261771 | 4 | #include "mbed.h" |
Raabinator | 0:56f636261771 | 5 | |
Raabinator | 0:56f636261771 | 6 | |
Raabinator | 0:56f636261771 | 7 | /* This Class handles a rotary encoder like the one from Pollin electronic (Panasonic EVEP...). |
Raabinator | 0:56f636261771 | 8 | * It uses two pins, one creating an interrupt on change. |
Raabinator | 0:56f636261771 | 9 | * Rotation direction is determined by checking the state of the other pin. |
Raabinator | 0:56f636261771 | 10 | * |
Raabinator | 0:56f636261771 | 11 | * Operating the encoder changes an internal integer value that can be read |
Raabinator | 0:56f636261771 | 12 | * by Get() or the operator int() functions. |
Raabinator | 0:56f636261771 | 13 | * A new value can be set by Set(value) or opperator=. |
Raabinator | 0:56f636261771 | 14 | * |
Raabinator | 0:56f636261771 | 15 | * Autor: Thomas Raab (Raabinator) |
Raabinator | 0:56f636261771 | 16 | * |
Raabinator | 0:56f636261771 | 17 | * Dent steady point ! ! ! |
Raabinator | 0:56f636261771 | 18 | * +-----+ +-----+ |
Raabinator | 0:56f636261771 | 19 | * pinA (interrupt) | | | | |
Raabinator | 0:56f636261771 | 20 | * --+ +-----+ +--- |
Raabinator | 0:56f636261771 | 21 | * +-----+ +-----+ |
Raabinator | 0:56f636261771 | 22 | * pinB | | | | |
Raabinator | 0:56f636261771 | 23 | * ----+ +-----+ +- |
Raabinator | 0:56f636261771 | 24 | * --> C.W |
Raabinator | 0:56f636261771 | 25 | * CW: increases position value |
Raabinator | 0:56f636261771 | 26 | * CCW: decreases position value |
Raabinator | 0:56f636261771 | 27 | * |
Raabinator | 0:56f636261771 | 28 | * changelog: |
Raabinator | 0:56f636261771 | 29 | * |
Raabinator | 0:56f636261771 | 30 | * 09. Nov. 2010 |
Raabinator | 0:56f636261771 | 31 | * First version published. |
Raabinator | 0:56f636261771 | 32 | * |
Raabinator | 0:56f636261771 | 33 | */ |
Raabinator | 0:56f636261771 | 34 | |
Raabinator | 0:56f636261771 | 35 | |
Raabinator | 0:56f636261771 | 36 | |
Raabinator | 0:56f636261771 | 37 | class CRotaryEncoder |
Raabinator | 0:56f636261771 | 38 | { |
Raabinator | 0:56f636261771 | 39 | public: |
Raabinator | 0:56f636261771 | 40 | CRotaryEncoder(PinName pinA, PinName pinB); |
Raabinator | 0:56f636261771 | 41 | ~CRotaryEncoder(); |
Raabinator | 0:56f636261771 | 42 | |
Raabinator | 0:56f636261771 | 43 | int Get(void); |
Raabinator | 0:56f636261771 | 44 | inline operator int() { return Get(); } |
Raabinator | 0:56f636261771 | 45 | |
Raabinator | 0:56f636261771 | 46 | void Set(int value); |
Raabinator | 0:56f636261771 | 47 | inline CRotaryEncoder& operator= ( int value ) { Set(value); return *this; } |
Raabinator | 0:56f636261771 | 48 | |
Raabinator | 0:56f636261771 | 49 | private: |
Raabinator | 0:56f636261771 | 50 | InterruptIn *m_pinA; |
Raabinator | 0:56f636261771 | 51 | DigitalIn *m_pinB; |
Raabinator | 0:56f636261771 | 52 | volatile int m_position; |
Raabinator | 0:56f636261771 | 53 | |
Raabinator | 0:56f636261771 | 54 | void rise(void); |
Raabinator | 0:56f636261771 | 55 | void fall(void); |
Raabinator | 0:56f636261771 | 56 | |
Raabinator | 0:56f636261771 | 57 | |
Raabinator | 0:56f636261771 | 58 | }; |
Raabinator | 0:56f636261771 | 59 | |
Raabinator | 0:56f636261771 | 60 | |
Raabinator | 0:56f636261771 | 61 | #endif |